Weekly Wrap-up 51/2020 The most important articles of the week in a photo gallery. So you can start the new week well-informed. Regina Bruckschlögl December 20, 2020 2 min reading time Interview: Phelas develops an energy storage system that works with liquefied airThe idea is to make electricity generated from renewable sources sustainable and decentralized, and available around the clock. We spoke with the founding team. (Photo: Phelas) read more ↓